Focusrite ISA ONE - Microphone Preamp

Focusrite ISA ONE - Microphone Preamp

Focusrite ISA ONE - Microphone Preamp

B&H # FOISAONE MFR # ISA-ONE
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Product Highlights

  • Single Channel
  • Transformer Based
  • Insert Point
  • Headphone Output

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Focusrite ISA ONE overview

  • 1Description

The ISA One from Focusrite is a single-channel, transformer-based microphone preamp, based on the original ISA 110 preamp that formed the cornerstone of each channel of the legendary Forte console. It features classic vintage topology and includes the Lundahl L1538 transformer and a custom Zobel network.

In addition to switchable input impedance settings for the microphone preamp, the unit includes a line input on XLR and 1/4" TRS phone jacks. An independent DI channel features a dedicated gain control, active or passive impedance switch, a 1/4" TRS output for routing to an amplifier, and an independent XLR output on the rear.

The ISA One features an insert point should the need arise to place extra signal processing between the preamp or DI, and the optional analog-to-digital converter. Phantom power, phase reverse and a 75 Hz, 18 dB/octave high-pass filter are also available from the angled front fascia.

Independent input metering for both channels is provided by a moving coil VU meter with variable calibration to suit analog and digital recording media, alongside two six-LED peak meters. Inputs can be metered either pre- or post-insert. The meter calibrations utilize the same reference points as Digidesign's Pro Tools HD systems, allowing effortless integration with Pro Tools.

Classic single-channel Focusrite microphone preamp with Independent DI
Ideal for both engineers and demanding performers alike, featuring independent gain control, an output for routing to an amp, an independent XLR output on the rear and routing to the optional ADC
Four, carefully selected, switchable input-impedance levels (including the original ISA 110 setting), to match or enhance the performance of any microphone
Headphone output with volume control can feed either a sum of the two inputs to the headphones output, or an external stereo cue mix (such as a stereo mix feed from an interface) via two TRS Jack inputs on the rear of the unit
Optional stereo 192 kHz analog-to-digital conversion card utilizes cutting-edge conversion technology and Focusrite analog circuitry to deliver the highest A/D performance with a dynamic range of 119 dB
Dedicated insert point allows the user to place extra processing such as an EQ or compressor, between the preamplifier or DI and the optional converter
UPC: 815301005100
In the Box
Focusrite ISA ONE - Microphone Preamp
  • AC Power Cable
  • Limited 2-Year Warranty
  • Table of Contents
    • 1Description

    Focusrite ISA ONE specs

    Number of Channels Single
    Inputs 1 x XLR Microphone
    1 x XLR Line
    1 x 1/4" TRS phone Line
    1 x 1/4" TRS phone Instrument
    1 x 1/4" TRS phone External Input
    1 x 1/4" TRS phone Cue Left
    1 x 1/4" TRS phone Cue Right
    1 x 1/4" TRS phone Return
    Output 1 x XLR Line
    1 x XLR DI
    1 x 1/4" TS DI Thru
    1 x 1/4" TRS phone Send
    1 x 1/4" TRS phone Headphone
    Phantom Power 48V
    Multi Function No
    Gain Range Mic: 0dB to 60dB in 10dB steps with 20dB of variable gain
    Line: -20dB to +10dB in 10dB steps with 20dB of variable gain
    Maximum Output Level Not specified by manufacturer
    Frequency Response 16Hz to 118kHz, -3.0dB @ maximum gain
    Noise Mic SNR: 106dB
    Line SNR: 120dB
    Dimensions (WxDxH) 8.7 x 10/11.4 x 4.1" (220 x 254/290 x 104 mm)
    Weight 8.6 lbs (3.9 kg)
    Packaging Info
    Package Weight 12.9 lb
    Box Dimensions (LxWxH) 16.2 x 15.5 x 9.3"

    Focusrite ISA ONE reviews

    ISA ONE - Microphone Preamp is rated 4.9 out of 5 by 7.
    Rated 5 out of 5 by from nice preamp Look real good in my studio set up. This pre makes all my recording sound way better. It has a full sound and a nice top end to it. just one look at the waveform and you can tell that its capturing more of what you may want in a recording it gets a 10 for vocals so far i have done six songs with it and i look to do more and more all the time . i have no bad comments on this pre a must have as a font end If you are looking to step up from a mixer or audio interface.
    Date published: 2012-06-08
    Rated 5 out of 5 by from Great Utility Preamp The ISA One is a great option for most situations that need a strong signal to help their recording pop. This pre has 80db of gain total and is much hotter than may other mixer/stand alone pres. The sound quality is bright and full. On guitars it gives a wonderful pump on the top and keeps the high frequencey detailed. If you are not used to a strong pre, this one will definately make you feel like your other pres are dark and colorless. The only complaint I have for this pre is that on very delicate sources like pianos or strings, it can add too much mid tones and make the strings sound very processsed rather than natural. This is not a negitave so much as it is a comment on its best uses. Again great for horns, guitars, bass, drums, and any other source that needs a little bit of pump to make the sound fuller.
    Date published: 2012-02-19
    Rated 5 out of 5 by from Absolutely transparent I was looking for portable mic pre that was quiet and transparent to add to my arsenal. I've also downsize significantly from the last jo, (with room full of gear) to a single desk, software plugins and rack-less gear that occupies a small footprint. The ISA One fits that desire nicely. It's very quiet and absolutely transparent. Which matters to me when I edit in post and not have to consider hardware added character, or going the extra mile when I find a need to cover it up or remove it. Especially when applying filters to work within the floor and to remove subtle room noise, staying in the gaps where its needed without cutting into the content. Upon first hookup and dial in, I was really surprised at how quiet my treated room is and that my previous gear, even when zero gained, still added something to the mix, (I had to confirm that with previous work that I thought was quiet). This simply adds nothing but gain only. In the past, most of my stuff wound up as highly compressed on the web, or going back to tape and noise was gained anyway due to the conversion. Not anymore. The edge this tool gives me will be realized in the final render. Glad I bought it.
    Date published: 2015-12-02
    Rated 5 out of 5 by from Great value and performance I bought this to supplement my Manley and Presonus preamps in my studio. The ISA One is VERY transparent, and sounds great on any mic I plug into it. Plus the headphone out option is very handy when tracking vocalists in the booth so I can hear them while I'm arming and disarming tracks without any cutout in my monitors. Great value and very portable.
    Date published: 2012-01-26
    Rated 4 out of 5 by from Great price for great pre amp. I already have the ISA 428 and a ISA 220 so I knew the ISA ONE (which uses the same circuits)would sound great. It has a very polished quality and I love the package. If I need to go somewhere and only need one channel or need an extra channel I will grab the ISA ONE and go. Love the headphone output and the big VU meter.
    Date published: 2012-02-13
    Rated 5 out of 5 by from Stellar Performance Looking for pro-quality equipment with a starter budget...this is the preamp for you. This preamp was provided the perfect quality for the 'at-home' recording studio I needed, plus the guidance by the B&H staff, it was made it super easy to put my system together.
    Date published: 2015-11-28
    Rated 5 out of 5 by from Clean Pre Nice preamp, transparent, clean. Gotta be the quietest I've owned, it puts the pre in Focusrite's own voicemaster pro to shame. Better than the pre's in my Yamaha console Figure this will work nicely with my 416 for voice
    Date published: 2013-11-13
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